Java tutorial
/* * Contributions to FindBugs * Copyright (C) 2008, Andrei Loskutov * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; either * version 2.1 of the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ package de.tobject.findbugs.view.explorer; import java.util.ArrayList; import java.util.Collections; import java.util.HashMap; import java.util.List; import java.util.Map; import org.eclipse.jface.dialogs.IDialogSettings; import org.eclipse.jface.viewers.ArrayContentProvider; import org.eclipse.jface.viewers.CheckStateChangedEvent; import org.eclipse.jface.viewers.CheckboxTableViewer; import org.eclipse.jface.viewers.ICheckStateListener; import org.eclipse.jface.viewers.IStructuredSelection; import org.eclipse.swt.SWT; import org.eclipse.swt.events.SelectionAdapter; import org.eclipse.swt.events.SelectionEvent; import org.eclipse.swt.layout.GridData; import org.eclipse.swt.layout.GridLayout; import org.eclipse.swt.widgets.Button; import org.eclipse.swt.widgets.Composite; import org.eclipse.swt.widgets.Control; import org.eclipse.swt.widgets.Shell; import org.eclipse.swt.widgets.Table; import org.eclipse.swt.widgets.TableColumn; import org.eclipse.ui.dialogs.SelectionDialog; import de.tobject.findbugs.FindbugsPlugin; /** * @author Andrei * */ public class GroupSelectionDialog extends SelectionDialog { private final List<GroupType> allowedGroups; private final List<GroupType> preSelectedGroups; private final Map<GroupType, Boolean> selectionMap; private CheckboxTableViewer checkList; private Button upButton; private Button downButton; public GroupSelectionDialog(Shell parentShell, List<GroupType> selectedGroups) { super(parentShell); this.preSelectedGroups = selectedGroups; this.allowedGroups = GroupType.getVisible(); selectionMap = new HashMap<GroupType, Boolean>(); initSelections(); } private void initSelections() { Collections.reverse(preSelectedGroups); for (GroupType type : preSelectedGroups) { if (allowedGroups.remove(type)) { allowedGroups.add(0, type); } } Collections.reverse(preSelectedGroups); for (GroupType groupType : allowedGroups) { selectionMap.put(groupType, Boolean.valueOf(preSelectedGroups.contains(groupType))); } } @Override protected Control createDialogArea(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); int columns = 2; composite.setLayout(new GridLayout(columns, false)); GridData layoutData = new GridData( GridData.FILL_BOTH | GridData.GRAB_HORIZONTAL | GridData.GRAB_HORIZONTAL); layoutData.minimumHeight = 200; layoutData.minimumWidth = 250; layoutData.heightHint = 200; layoutData.widthHint = 250; composite.setLayoutData(layoutData); checkList = CheckboxTableViewer.newCheckList(composite, SWT.SINGLE | SWT.BORDER | SWT.RESIZE | SWT.V_SCROLL | SWT.H_SCROLL); Table table = checkList.getTable(); table.setHeaderVisible(true); table.setLinesVisible(false); table.setLayoutData(new GridData(GridData.FILL_BOTH)); TableColumn nameColumn = new TableColumn(table, SWT.NONE); nameColumn.setText("Group Visibility / Sort Order"); nameColumn.setResizable(true); nameColumn.setWidth(170); checkList.setContentProvider(new ArrayContentProvider()); // ITableLabelProvider labelProvider= new SeparateTableLabelProvider(); // checkList.setLabelProvider(labelProvider); checkList.setInput(allowedGroups); checkList.setCheckedElements(preSelectedGroups.toArray()); checkList.addCheckStateListener(new ICheckStateListener() { public void checkStateChanged(CheckStateChangedEvent event) { boolean checked = event.getChecked(); GroupType element = (GroupType) event.getElement(); selectionMap.put(element, Boolean.valueOf(checked)); } }); table.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { handleTableSelection(); } }); createButtonList(composite); return composite; } private void createButtonList(Composite parent) { Composite composite = new Composite(parent, SWT.NONE); composite.setLayoutData(new GridData(SWT.BEGINNING, SWT.BEGINNING, false, false)); GridLayout layout = new GridLayout(); layout.marginWidth = 0; layout.marginHeight = 0; composite.setLayout(layout); upButton = new Button(composite, SWT.PUSH | SWT.CENTER); upButton.setText("Up"); upButton.setEnabled(false); upButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { int index = getSelectionIndex(); if (index != -1) { moveUp(allowedGroups.get(index)); checkList.refresh(); handleTableSelection(); } } }); GridData data = new GridData(); data.widthHint = 50; data.horizontalAlignment = GridData.FILL; upButton.setLayoutData(data); downButton = new Button(composite, SWT.PUSH | SWT.CENTER); downButton.setText("Down"); downButton.setEnabled(false); downButton.addSelectionListener(new SelectionAdapter() { @Override public void widgetSelected(SelectionEvent e) { int index = getSelectionIndex(); if (index != -1) { moveDown(allowedGroups.get(index)); checkList.refresh(); handleTableSelection(); } } }); data = new GridData(); data.widthHint = 50; data.horizontalAlignment = GridData.FILL; downButton.setLayoutData(data); } @Override protected IDialogSettings getDialogBoundsSettings() { IDialogSettings dialogSettings = FindbugsPlugin.getDefault().getDialogSettings(); IDialogSettings section = dialogSettings.getSection("GroupSelectionDialog"); if (section == null) { dialogSettings.addNewSection("GroupSelectionDialog"); } return section; } void moveUp(GroupType type) { int indexOf = allowedGroups.indexOf(type); allowedGroups.remove(indexOf); allowedGroups.add(indexOf - 1, type); } void moveDown(GroupType type) { int indexOf = allowedGroups.indexOf(type); allowedGroups.remove(indexOf); allowedGroups.add(indexOf + 1, type); } private void handleTableSelection() { GroupType item = getSelectedItem(); if (item != null) { int index = getSelectionIndex(); upButton.setEnabled(index > 0); downButton.setEnabled(index < allowedGroups.size() - 1); } else { upButton.setEnabled(false); downButton.setEnabled(false); } } private GroupType getSelectedItem() { return (GroupType) ((IStructuredSelection) checkList.getSelection()).getFirstElement(); } private int getSelectionIndex() { return checkList.getTable().getSelectionIndex(); } public List<GroupType> getGroups() { List<GroupType> selected = new ArrayList<GroupType>(); for (GroupType groupType : allowedGroups) { if (selectionMap.get(groupType).booleanValue()) { selected.add(groupType); } } return selected; } }